Failed to process import candidates for configuration class

Question

I\'ve a spring boot project that I can run successfully from within IntelliJ, but when I package an executable jar I can no longer run it. Here is the stack trace of the exc

Answer 1

I've also gotten the

Failed to process import candidates for configuration class [...]; nested exception is java.lang.IllegalStateException: Unable to read meta-data for class ...

error due to a typo in my spring.factories file. In this case the root exception was

class path resource [...] cannot be opened because it does not exist.

This is an important spot to check since it can't be validated at compile time.

Answer 2

I switched from mvn clean compile assembly:single to mvn clean package and the error went away.

Answer 3

I think that you have forgotten to use Annotation in your AppConfig.

Add following three annotations to your AppConfig class:

@Configuration
@EnableWebMvc
@ComponentScan("Scan_Package_Name") 
public class AppConfig {
  ... some beans
}

Answer 4

I just figure it out, I should have been using Spring Boot maven plugin instead. Now the build section of my pom.xml looks like:

<build>
<plugins>
  <plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
      <fork>true</fork>
      <mainClass>dz.lab.jpmtask.App</mainClass>
    </configuration>
    <executions>
      <execution>
        <goals>
          <goal>repackage</goal>
        </goals>
      </execution>
    </executions>
  </plugin>
  <plugin>
    <groupId>org.jacoco</groupId>
    <artifactId>jacoco-maven-plugin</artifactId>
    <!--<version>0.7.8-SNAPSHOT</version>-->
    <executions>
      <execution>
        <id>jacoco-initialize</id>
        <goals>
          <goal>prepare-agent</goal>
        </goals>
      </execution>
      <execution>
        <id>jacoco-site</id>
        <phase>verify</phase>
        <goals>
          <goal>report</goal>
        </goals>
      </execution>
    </executions>
  </plugin>
</plugins>
</build>

I build the project with mvn clean package and then java -jar target/myproject.jar and it works like a charm.

Answer 5

I solved it as follows:

1. Delete the spring-boot-maven-plugin
2. Config spring transformers in shade plugin please refer to spring parent pom